APA (7 वां संस्करण) प्रशस्ति पत्र

(1956). The LEC newsletter: Volume 2, number 6, March-April 1956. Labor Education Center, University of the Philippines.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

The LEC Newsletter: Volume 2, Number 6, March-April 1956. Manila: Labor Education Center, University of the Philippines, 1956.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

The LEC Newsletter: Volume 2, Number 6, March-April 1956. Labor Education Center, University of the Philippines, 1956.